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Loan Servicing (Tables) | 12 Months Ended
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Dec. 31, 2017
Transfers and Servicing of Financial Assets [Abstract] |
Schedule of servicing assets at amortized value | Activity for MSRs and the related valuation allowance follows:
December 31 (In thousands) |  | 2017 |  | 2016 |  | 2015
MSRs: |  |  |  |  |  |
Carrying amount, net, beginning of year |  | $ | 9,266 |  |  | $ | 9,008 |  |  | $ | 8,613 |
Additions |  | 1,941 |  |  | 2,286 |  |  | 1,748 |
Amortization |  | (1,624 | ) |  | (1,835 | ) |  | (1,637 | )
Change in valuation allowance |  | 105 |  |  | (193 | ) |  | 284 |
Carrying amount, net, end of year |  | $ | 9,688 |  |  | $ | 9,266 |  |  | $ | 9,008 |
Valuation allowance: |  |  |  |  |  |
Beginning of year |  | $ | 735 |  |  | $ | 542 |  |  | $ | 826 |
Change in valuation allowance |  | (105 | ) |  | 193 |  |  | (284 | )
End of year |  | $ | 630 |  |  | $ | 735 |  |  | $ | 542 |

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- Definition Tabular disclosure of activity in the balance of servicing assets subsequently measured at amortized cost. Includes, but is not limited to, beginning and ending balances, additions, disposals, and amortization. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122739-111746 + Details
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- References No definition available. + Details
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